Diff just started whining!

Optimiser · 11-08-2016, 06:19 PM

Quote:

Originally Posted by JARblue

FWIW, I ran over a chunk of concrete a few months ago and got my insurance to cover the damage

Good luck with the repairs

Thanks about reminding me I could do an insurance claim on it. I'd forgotten to consider that.

JJ's370z · 11-09-2016, 09:05 AM

Let us know how that goes you should have a decent chance.

BGTV8 · 11-08-2016, 01:30 AM

Good you got to the bottom of it ............

Optimiser · 11-30-2016, 05:51 PM

After having the diff dropped out twice, bearings replaced, etc, the diff was still whining when you lifted off the throttle. My "shop" put my original OEM crown wheel and pinion back in (I was running the 4.08 FD) and all was good and quiet. The (damaged) 4.08 pinion was put between centers on a lathe, a dial indicator applied and guess what? It's slightly bent and therefore not running concentrically which was causing the whining noise! All this because I ran over a bit of light gauge RHS steel tube that had fallen off a truck or something!

I have now ordered what will be my second 4.08 FD set! I've yet to try an insurance claim

11-30-2016, 05:51 PM	#4 (permalink)
Optimiser Enthusiast Member Join Date: Mar 2013 Location: Australia Posts: 457 Drives: 2012 Nissan 370Z MT Rep Power: 20146	Update: After having the diff dropped out twice, bearings replaced, etc, the diff was still whining when you lifted off the throttle. My "shop" put my original OEM crown wheel and pinion back in (I was running the 4.08 FD) and all was good and quiet. The (damaged) 4.08 pinion was put between centers on a lathe, a dial indicator applied and guess what? It's slightly bent and therefore not running concentrically which was causing the whining noise! All this because I ran over a bit of light gauge RHS steel tube that had fallen off a truck or something! I have now ordered what will be my second 4.08 FD set! I've yet to try an insurance claim

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11-09-2016, 09:05 AM	#2 (permalink)
JJ's370z Base Member Join Date: Aug 2016 Location: Australia Posts: 105 Drives: 14 370z DB M6 Rep Power: 51	Let us know how that goes you should have a decent chance.

11-08-2016, 01:30 AM	#3 (permalink)
BGTV8 A True Z Fanatic Join Date: Dec 2009 Location: 03350 Australia Posts: 1,516 Drives: 09 Nissan 370Z M6 Rep Power: 39975	Good you got to the bottom of it ............